I'm pretty sure, all mammals can flex, think about it. Every mammal has a backbone, backbones allow them to bend, therefore Almost All mammals can flex.
The flex
Do mammals have hair on their body, yes. that is one of the many traits of a mammal. ~Nameless
It keeps some mammals warm and even humans (who are mammals). That is why many six year old kids are fat.
Most mammals have fur or hair .
A mammals covered with hairand skin.
Mammals need to keep their body warm and it is possible by the body covering they have...fur and hair
To "flex" is a slang - meaning to strut, or physically show off something - usually the body. "Flex in on your ex" suggests that whoever this is said about intends to do this to you ex partner (e.g. I am going to flex in on your ex, he is going to flex in on your ex, she is..., they are..., etc). Basically - that the person who is going to flex is going to make a move on your ex.
FLEX magazine is a magazine that mainly deals with articles and news on the subject of body building and weight lifting. FLEX also shares nutrition and dietary tips for its readers.
Skin, hair and fur are all the examples of body covering of mammals.
The body covering of birds is feathers. Mammals are covered in fur or hair.
The 2009 Ford Flex has 24 valves.
The 2011 Ford Flex has 24 valves.